Perforating-wheel



(No Model.)

J. JENSIK & G. STOLL.

PERFORATING WHEEL.

No. 424,676. PatentedApr. 1, 1890.

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UNITED STATEs PATENT OFFICE.

JOSEPH .IENSIK AND CHARLES STOLL, OF CHICAGO, ILLINOIS.

PERFORATlNG-WHEEL.

SPECIFICATION forming part of Letters Patent No. 424,676, dated April 1,1890.

Application filed December 21, 1889. Serial No. 334,525- (No model.)

To all whom it may concern:

Be it known that we, J OSEPH J ENSIK and CHARLES SroLL, both of Chicago,in the county of Cook and State of Illinois, have invented a new anduseful Improvement in Perforating-Vheels, of which the following is afull, clear, and exact description.

This invention relates to wheels for perforating paper, includingchecks, drafts, bills, and other instruments or papers which require tobe separated from their stub or duplicate by tearing them through thelines or rows of perforations made by the wheel or wheels.

The improved perforating-wheel is mainly designed to be used inpaper-ruling machines and to be carried by a holder which may beattached to a clamp, as ruling-pens in such machines are secured,with orwithout striker attachment, and as a ruling-machine attachment it willbe found very serviceable in small binderies, where it would not beprofitable to have a separate perforating-machine.

Our invention consists in a novel construction of the perforating-wheel,substantially as hereinafter described, and pointed out in the claim,and whereby a very slight pressure is required when such wheels are usedupon a ruling-machine to effect the necessary perforations without inur1ng the cloth on which the paper rests, although the perforatin gdevices may be regulated, as ruling-pens are set to mark light or heavy,according to the thickness of the paper to be perforated, and acontinuous score is formed on the paper by each perforating-wheel.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 represents a view in perspective of one of our improvedperforating-wheels as carried by a holder suitable for attachment to aruling-machine by clamp, as the ruling-pens are secured. Fig. 2 is aside view, upon a larger scale, of said wheel detached and as in the actof perforating a piece of paper; and Fig. 3 is a central transversesection of said wheel also in operation on the paper.

A indicates the Wheel, and 13 its holder. Said wheel, which ispreferably made of steel, consists of a main body part I), having aperipheral bearing-face}, with a rim port on 0 around the one side oredge of it, forming a peripheral projection from the body, andperforating-teeth (1, arranged to project in radial directions from saidrim. \Ve find from experiment that the diameter of the wheel is bestnotto exceed three-eighths of an inch, and may be even less, and that thesame should have from thirty-five to forty-five teeth to the inch, saidteeth being about one-twentieth of an inch from their points to the rim0, and the distance of the teeth apart leaving a shoulder-surface 6between them of preferably a little less than one-twentieth of an inch.The teeth are thus made smaller at their base than the distance fromtheir points to the rim, which causes a continuous mark or score to beformed on the paper f without any tendency of the perforations to runone into the other, the rim 0 gradually tapering on its sides from whereit joins the body I) of the wheel to where it joins the roots of theteeth. Vere the teeth to project directly from the body of the wheelwithout the intervention of the peripheral shoulder or rim 0, the sameeffect would not be produced, and the perforations would not admit ofthat neat tearing of the paper as it does when a continuous score ismade 011 the sheet. The body Z), by its peripheral bearing-surface s,keeps the perforating-rim c from going too deep, and also serves to bindthe paper f to the cloth h and prevent itfrom slipping and from stickingor stopping. By this construc tion of the perforating-vl1eell am enabledto use five or six perforating-wheels in a machine without producingstoppage of the sheet, whereas with the ordinary construction ofperforating-wheels but two could be used. Having thus described our.invention, we claim as new and desire to secure by Letters Patent- Thewithin described perforating Wheel, consisting of a body part having aperipheral beari ng-surface and a peripheral rim or sho ulder on the oneside or edge of said body part, provided with pointed teeth projectingradially from said rim, and constructed to leave a space between them011 the rim and smaller at their base than the distance from theirpoints to the rim, substantially as specified.

JOSEPH JENSIK. CHARLES STOLL. Witnesses:

CHARLES J. JOHNSON, GEORGE SoHoDrLER.

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